Basis Of Presentation (Details) (Health And Well-Being Services [Member], USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Health And Well-Being Services [Member]
Depreciation and amortization expense	$ 7.9	$ 5.8	$ 24.6	$ 14.6